Improvement in heating-stoves



JAMES l. PRENDERGA-ST.

HeatingfStove. N0. 128,247, Patented June 25,1872.

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PATENT OEEIGE.

JAMES J. PRENDERGAST, OF STfPAUL, MINNESOTA.

IMPROVEMENT IN HEATING-STOVES.

Specification forming part of Letters Patent No. 128,247, dated June 25, 1872.

Specification describing certain Improvements in Stoves, invented by JAMES JOSEPH PRENDERGAST, of the city of St. Paul, in thecounty of Ramsey and State of Minnesota.

The principal object of my invention is to heat and to ventlate With economy rooms which, from any cause, are liable to an excess of impure air. It is especially adapted for use in hospitals or school-rooms, in both of which the want of some simple apparatus which would furnish both heat and ventilation has long been felt. Many attempts have been made to overcome the difculties which exist in rooms that, from their construction, cannot be iitted with hot-air furnaces and the usual Ventilating-pipes; but my method is the most prfect of any which has come to my knowle ge.

In the drawing, Figure 1 is the end view of a Wood-burning stove in which I have embodied my invention 5 Fig. 2, a section of the same on the line z z, the pipe `J being shown out of place; Fig. 3, a section on the line x w,-

- and Fig. 4, a section on the line y y.

I construct my stove with ve chambersviz.: First, a fresh-air chamber, E; second, a fire-chamber, C; third, a hot-air chamber, G; fourth, a smoke-chamber, B; and ii'th, a foulair chamber, K, all being provided With flues, as hereinafter specified.

D is a pipe, which receives fresh or outer air in lthe usual manner and supplies it to the chamber E, where it is distributed to the iiues F, by means of which it passes through the fire-chamber C into the hot-air chamber G, and from thence it is thrown into the room through the pipes H, being heated as it passes through the pipes and chambers.

The fire is built in the chamber C, and the smoke passes up the iiues a through the hot-air chamber into the smoke-chamberB, from which it is taken to the chimney by means of the funnel A. The impure air is drawn fromv near the floor into the pipes J and carried to the foulair chamber K, frm which it passes into a iiue, N, which surrounds thefunnel A; and both A and N are carried into the chimney.

A damper'is placed inthe fresh-air ilue, as.

air chamber and its ilue, cause the air near` the iloor to be rapidly drawn up and expelled through the chimney, thus giving a complete circulation of air to the apartment, While the radiation of heat will be the same as that of an ordinary stove.

Instead of using Wood for fuel, a simple arrangement would it the stove for coal and yet preserve all its features.

I have shown in Fig. 1 the foul-air chamber as raised above the hot-air chamber, thus giving more radiating-surface to the stove than that shown in Fig. 2. This might, in some cases, be an advantage; but I prefer the arrangement shown in Fig. 2.

I claim as my invention- In combination with a radiating-stove, the fresh-air pipes and chambers D, E, F, G, and H and the Ventilating pipes and chambers J, K, and N, when the Whole are constructed and operated substantially in the manner shown and described.

J. J. PRENDERGAST. Witnesses:

CEAS. F. SLEEPER, J. C. PEENDERGAsT. 

